Long-term Debt - Additional Information (Detail)				1 Months Ended	8 Months Ended	9 Months Ended
	Nov. 01, 2016 USD ($)	Apr. 30, 2015 USD ($)	Jun. 10, 2014 USD ($)	Nov. 30, 2016 USD ($)	Nov. 01, 2016 USD ($)	Nov. 30, 2016 USD ($)	Feb. 29, 2016 USD ($)	Jun. 16, 2014 USD ($)	May 30, 2012 USD ($)
Debt Instrument
Unamortized discount on issuance of debt				$ 7,570,000		$ 7,570,000	$ 9,287,000
Repayments of Debt						15,000,000
Asset Sale Proceeds Subject to Reinvestment	$ 10,000,000
Debt Instrument, Periodic Payments, Quarterly Amounts Due				1,600,000	$ 2,300,000
98.7FM Non-recourse debt
Debt Instrument
Face amount of debt									$ 82,200,000
Interest rate during period									4.10%
Non-recourse debt				61,356,000		61,356,000	65,411,000
Digonex Non-recourse debt
Debt Instrument
Face amount of debt								$ 6,200,000
Interest rate during period								5.00%
Non-recourse debt				5,270,000		5,270,000	4,714,000	$ 3,600,000
Maximum
Debt Instrument
Debt Compliance Consolidated EBITDA permitted addback, Going Private not approved						2,500,000
Debt Compliance Consolidated EBITDA permitted addback, Going Private approved						8,000,000
98.7FM Non-recourse debt
Debt Instrument
Unamortized discount on issuance of debt				2,000,000		2,000,000	(2,200,000)
Revolver
Debt Instrument
Repayments of Debt	8,500,000
Digonex Non-recourse debt | Non-recourse debt
Debt Instrument
Face amount of debt				6,200,000.0		6,200,000.0
Two Thousand Fourteen Credit Agreement
Debt Instrument
Total Credit Agreement debt				158,955,000		$ 158,955,000	184,762,000
Provision for credit facility increase			$ 20,000,000
Borrowings on revolving credit facility			13,000,000
Percentage of principal due in quarterly installments						1.00%
Commitment Fee, Percentage of Line of Credit and Term Loan						5000.00%
Commitment fee						0.50%
Unamortized discount on issuance of debt			7,100,000	5,500,000		$ 5,500,000
Contingent debt amendment fee						0.50%
Two Thousand Fourteen Credit Agreement | Term Loan
Debt Instrument
Total Credit Agreement debt				156,955,000		$ 156,955,000	181,762,000
Maximum borrowing capacity			185,000,000.0
Face amount of debt			185,000,000
Proceeds from issuance of debt			109,000,000
Long-term debt held in escrow			76,000,000
Two Thousand Fourteen Credit Agreement | Revolver
Debt Instrument
Total Credit Agreement debt				$ 2,000,000		2,000,000	$ 3,000,000
Maximum borrowing capacity			20,000,000.0
Two Thousand Fourteen Credit Agreement | Letter of Credit
Debt Instrument
Maximum borrowing capacity			5,000,000.0
First Amendment to Two Thousand Fourteen Credit Agreement
Debt Instrument
Amortization of financing costs						$ 1,000,000
Debt covenant increased leverage ratio amount						6.00
Debt covenant maximum severance expense excluded from consolidated EBITDA						$ 5,000,000
Debt covenant, maximum losses attributable to reformatting of radio stations included in consolidated EBITDA						$ 2,500,000.0
Prepayment fee, percentage						1.00%
Increase in basis spread on variable rate						0.25%
Debt covenant, leverage ratio threshold for applicable margin						5.00
Second Amendment to Two Thousand Fourteen Credit Agreement [Member]
Debt Instrument
Debt Instrument, Periodic Payment, Percentage of Principal Due in Quarterly Installments, Period One		0.50%
Debt Instrument, Periodic Payment, Percentage of Principal Due in Quarterly Installments, Period Two		1.25%
Amortization of financing costs		$ 1,100,000
Debt Instrument, Debt Covenant, Leverage Ratio, Period One, Maximum		6.75
Debt Instrument, Debt Covenant, Leverage Ratio, Period Two, Maximum		6.50
Debt Instrument, Debt Covenant, Leverage Ratio, Period Three, Maximum		6.25
Debt Instrument, Debt Covenant, Leverage Ratio, Period Four, Maximum		6.00
Debt Instrument, Debt Covenant, Leverage Ratio, Period Five, Maximum		5.75
Debt Instrument, Debt Covenant, Leverage Ratio, Period Six, Maximum		4.00
Debt Instrument, Prepayment Fee, Period One, Percentage		2.00%
Debt Instrument, Prepayment Fee, Period Two, Percentage		1.00%
Term Loan
Debt Instrument
Repayments of Debt	$ 15,000,000
Base Rate | Two Thousand Fourteen Credit Agreement
Debt Instrument
Minimum interest rate as a percentage						2.00%
Basis spread on interest rate						3.75%
Base Rate | Second Amendment to Two Thousand Fourteen Credit Agreement [Member]
Debt Instrument
Basis spread on interest rate		5.00%
London Interbank Offered Rate (LIBOR) | Two Thousand Fourteen Credit Agreement
Debt Instrument
Minimum interest rate as a percentage						1.00%
Basis spread on interest rate						4.75%
London Interbank Offered Rate (LIBOR) | Second Amendment to Two Thousand Fourteen Credit Agreement [Member]
Debt Instrument
Basis spread on interest rate		6.00%
WBLS-FM and WLIB-AM
Debt Instrument
Cash paid at first closing			55,000,000
Cash payable at second closing			$ 76,000,000